We gear up for the 2021 US Open with the first and only installment of the USO Power Rankings. Find out if anyone tops Novak Djokovic, who leads the NowGen between Alexander Zverev, Daniil Medvedev, Andrey Rublev and Stefanos Tsitsipas, and where players like Jannik Sinner, Denis Shapovalov and Pablo Carreno Busta land. In the second leg of the show, Gill breaks down Zverev's new and improved shot, which has helped him to 11 straight victories. And since it's always mental with Zverev, his mindset heading into New York is also covered at length.